Scarifier.



D. B. COOK.

SUARIPIBR.

APPLICATION FILED JUNE 30, 1913.

1,1 1 5,900. Patented Nov. 3, 1914.

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4' IN VENTOR.

THE. NORRIS PETERS CO.. PHOTO-LITh WASHINGTON D. C,

ITE s'ratrus PATENT OFFICE.

. DAVID B. cooin'or FRANKFURT, NEW YORK, ASSIGNOR To ACME noun MACHINERY COMPANY, or ranniironnnnw YORK, 'A CORPORATION or NEW YORK.

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Specification of 'Iaatters Patent.

,Patented Nov. 3, 1914.

Original application filed August 29, 1912, Serial No. 717,810. Divided and this applicationfiled June 30,

e y i 1a13.- SeriaINo. 776,731. i

To all whom it may concern: 1

Be it known that I, DAVID B. CooK, of Frankfort, in the county of Herkimer, in the State of New York, have invented new and useful Improvements in Scarifiers, of

which the following, taken in connection plowing, the work is notjonly unusually expensive and laborious, but requires considerable power, and results in frequent breakages of the apparatus employed and renders the use of mechanical motive power (which is preferable) impractical. Fun, thermore, it is frequently necessary to use" apparatus of this character upon narrow road beds or highways where it is impossi ble, or at least inconvenient, toturn the entire apparatus around for operation in reverse directions along such road bed.

' The main object, therefore, of my present invention is to render this scarifying operation more efiicient and less laborious than has heretofore been practised and, at the same time, to permit the machine to be drawn or propelled from either end with a minimum degree of motive power.

Another obiect is to provide the scarifier with forwardly converging rows of teeth disposed at an acute angle to each other, the teeth of opposite rows being spaced longitudinally: substantially equal; distances apart'but transversely at gradually increasing distancesfrom front to rear so as to cause them to travel 1n-l1nesparallel'w1th and at opposite sides of the centerline of draft thereby reducing and more'evenlydistributing the load or resistance offered bythe entrance of the teeth into'the road bed of, draft with less g cific parts of the machine out in the following is a horizontal sectional view through one of the teeth and adjacent portion of the the opposite ends, the latter being connected and, at the same time, causing the machine to travel more easily along the separateline V liability of swerving to right or left. Other objects and uses relating to spewill be brought description. I Figurel is a perspective view of the detached scarifying; implement or tooth-supj porting frame except that the counter weightisremovedr +Fig. 2 is a horizontal sectional view through the front end of the scarilier taken on line 22, Fig. 1. Fig. 3

frame showing the fastening means for the tooth. Fig. 4 is a transverse vertical-sectional view through' one side of the scarifier fraineshowing more particularly the guard rails and fasteningineans therefor. Fig. 5

is a longitudinal vertical sectional view through Fig. 1., I

This. scarifying implement 2, is adapted to be flexibly andreversibly mount ed upon the underside of a main supporting frame as shown in my pending application No. 717,810 filed August 29,1912, of which this is a division and comprises a triangular the center of the scarifier shown in frame of suitable length capable of being turned end for end between the wheels about a vertical axis and composed of op posite side bars or I-beams,24 of uniform length arranged at an acuteangle with each other so as to diverge in substantiallystraight lines from one end toward by a crossbar -25 as shown more clearly in Figs. 1 and 5. This cross bar 25 which is rigidly] secured to the adjacent ends of :the said bars 2 l' serves the double purpose of bracing and holding said side bars a uniform distance apart and also for receiving and supporting a suitable counterweight -26- for counter-balancing the scarifyingimplement upon its swivel or pivotal support presently described. The

opposite or converging ends of the said bars 2' are secured by bolts 27' to opposite faces of an intervening draw plate 528 having a' series of bolt holes 29, for receiving a pivotal bolt 30 by which clined master tooth 34-, the latter being firmly held in operative position by a U- shape clip bolt 35 and a clip 36 which is drawn by the bolt 35 tightly against the rear edges of the plates 82 and -33 as shown more clearly in Figs. 2 and 5. j

The outer flanges of each of the bars are provided with a series of, in this instance six, vertically inclined recesses -37- for receiving a corresponding number of similarly inclined cutter bars or teeth 3&, which are fitted with an easy sliding fit in their respective recesses to firmly hold them against longitudinal movement; on the side bars of the frame and are additionally held in operative position by separate fastening devices consisting in this instance of clips 38': andbolts' 89 the latter passing through apertures in the adjacent portions of the webs of the side bars as shown more clearly in Fig. 4- and thereby permitting the teeth to .be adjusted vertically to'bring their points into the same horizontalplane and also to compensate for wear.

The main bodies or central portions of the teeth are preferably rectangular and elongated in cross section and are arranged edgewise vertically in planes substantially parallel with the longitudinal center of the frame and, therefore, parallel with the line of draft so as to afford ainaximum'degree of rigidity in resisting the transverse strains to which the teeth may be subjected. The teeth 34:- are also spaced a uniform distance apart longitudinally of the frame and, therefore, the transverse distance between the corresponding teeth at opposite sides gradually increase from front to rear so as to cause the teeth to travel in difierent paths parallel with the longitudinal center of the frame and consequently with the line of draft as the machine ispropelled over the road bed.

The front master tooth 34.- is subjected to the mostsevere initial strain by reason of the fact that it is firstto enter the road bed and is, therefore, made somewhat heavier than the other teeth 3l but all of the teeth are preferably made of hardened steel properly tempered to withstand the strainsto which they are-subjected and are preferably of the same length and pointed at both ends so as to permit them to be reversed endfor end when necessary or desirable. For example, in case the active point of one tooth should break, said tooth may be easily removed and reversed end for end and re-clamped in place without appreciable loss of time or inconvenience.

All of the teeth are positioned at substantially the same angle so as to incline downwardly and forwardly and their cutting edges are slightly curved toward the front of the frame and beveled transversely to produce a better cutting edge capable of wedging itself more effectively into the road bed or pavement and at the same time exerting an uplift upon the loosened material as the machine is propelled.

A pair of rearwardly diverging guardrails l(), consisting in this instance of angle-irons, are secured by bolts 41 and spacing sleeves 42 to the upper sides of and-parallel with the side bars 24 so as to cover theupper pointed ends of the teeth --"at for. the purpose of reducing the liability of injury to the operator or attendants,said guard-rails being also secured at their front ends to the draw plate -28.

The scarifying. implement is preferably supported at a point near its center of gravso that it may be easily turned or reversed end for end by hand about a vertical aXis or tilted in any direction relatively to such axis in the manner hereinafter described and for this purpose I have provided the frame with a cross-bar 45 having its ends secured to the intermediate portions ofthe side bars -'-24- and to the central portion of this cross bar is secured an upwardly projecting pivotal bolt --46- having an adjusting nut 4:7 which is swivelly connected to a hanger 48 on the underside of a superposed supporting frame (not shown).

. The upper and lower flanges of the scarifier bars -24 are reinforced by length- I wise steel plates 80 riveted or otherwise secured thereto and are recessed in one side to correspond to the recesses 37 for receiving the teeth 34 and additionally bracing them against relative movementlongitudinal of the frame.

The nut -47 on the pivotal bolt -&6 rests upon the upper surface ofthe hanger 48 and together with the bolt forms the main support for the scarifier about "which the latter isadapted to turn end for end to cause the apex thereof to face either end of,

the machine according to the direction of movement thereof although the front end of said scarifier is additionally supported by the link ,31. 1

- What I claim is: c

1. A road scarifier, including a framework, a plurality of teeth carried thereby, and teeth-retaining bars connected to said frame-work above the same and serving to prevent the upward displacement of the teeth.

2. A road scarifier, includin a framework, a plurality of teeth carrled thereby, and teeth-retaining bars connected to said frame-work and engaging the upper ends of said teeth, for the purpose specified.

3. A road scarifier including a framework a plurality of teeth carried thereby, and teeth-retaining bars of angular cross section connected to said framework and preventing upward displacement of the teeth.

4. A scarifying implement including side bars angularly disposed with respect to the direction of movement of the implement, upper and lower laterally extending flanges upon each side bar, a series of alined notches in said flanges, the notch of each series in the upper flange disposed to the rear of the notch of the same series in the lower flange,

the inner edges of the notched portions disposed in a plane substantially parallel with the direction in which the implement is adapted to move, scarifying teeth in said alined notches and means for holding said teeth in operative position.

5. A road scarifier including a framework, a plurality of teeth carried thereby, teeth retaining bars above theframe work and serving to prevent the upward displacement of the teeth, bolts connecting said bars to said frame work, and spacing sleeves mounted on said bolts between the bars and the frame work. a

In witness whereof, I have hereunto set my hand this 30th day of April, 1913.

DAVID B. COOK.

Witnesses:

WALTER A. 0001:, A. E. PATTERSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

